Roofing cutter



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Feb. 7, 1939. c Q KRAJlEK 2,145,985

ROOFING CUTTER Filed Oct. 27, 1936 Charles CE gl'e/i.

H [S ATTORNEYS Patented Feb. 7, 1939 UNITED STATES PATENT @FFICE ROOFING CUTTER Charles C. Krajicek, Cicero, Ill.

Application October 2'7, 1936, Serial No. 107,913

4 Claims. (Cl. 30-294) My invention relates to the art of cutting, tate breaking of the blade I provide both cutting marking, and trimming roofing and siding maedges with inwardly extending slots 24 which are terial; and has among its objects and advantages aligned so that the blade is weakened transversethe provision of an improved cutting and marklyof its longitudinal axis and will break in a ing tool; straight line. To aid in breaking the blade one 5 In the accompanying drawing: corner of the body I!) is slotted at 26 for the re- Fig. 1 is a perspective view of my invention; ception of the blade. After the blade has been Fig. 2 is an end view; positioned as illustrated by dotted lines in Fig. 3 Fig. 3 is a sectional view along the line 3-3 lateral pressure on the blade will cause it to of Fig. 2; break along the line 28. The slots 24 are spaced 10 Fig. 4 is a sectional view along the line 4--4 of relatively close, but the spacing is such as to Fig. 3; and permit sufficient projection of the blade to cut Fig. 5 is a View illustrating the manner in all types of conventional roofing material. In which a sheet of roofing material may be cut. Fig. 3, I illustrate the projecting end of the blade In the embodiment selected to illustrate my inas being adjusted to cut its maximum depth, vention I make use of a body IU of such size and at which time the nearest slot 24 lies within the shape as to be readily grasped in the hand. The angular face 18. Various degrees of projection body is generally rectangular in configuration are easily attained by merely loosening the set and comprises metal. Metal gives the body an screw i6.

advantageous weight which facilitates effective In the laying of roofing material it is frel0 manipulation of the tool. One edge of the body quently necessary to place a sheet in position H) is provided with a slot 12 extending the full and mark the sheet to conform to the shape and length of the body for the reception of a thin area of the surface to be covered. After markcutting blade H! which is secured within the slot ings are made, lines are drawn through the by means of a set screw l6. markings and the roofing material severed along 25 In applying composition, shingles, siding and such lines. To facilitate marking I provide the roofing material to buildings it is necessary to body it with a blade 36 provided with two out some of the material. One face of the matoothed surfaces 32. The saw nature of the terial is usually covered with a mineral subreaches 32 out easily into the roofing material stance which is difficult, if not impossible, to cut for marking purposes. I mount the blade on 30 and which dulls cutting edges. My tool embodies one side of the body If! through the medium. of

a cutting blade and means cooperating therea pin 34 and a set screw 38. The pin 34 is fixwith for limiting the depth of the cut but peredly connected with the body Hi and projects mits the material to be cut substantially through through an opening 38 in the blade 30'. In Fig. 4,

35 to the coated surface so as to permit separation I illustrate the set screw 36 as having threaded 5 of the roofing material. To this end the body I!) relation at it with the body it, which screw inincludes an angular guide surface 18 upon which cludes a flange 42 for pressing the blade 30 one corner of the blade I4 projects. In cutting, against the body. Because of the pin 34 and the the roofing material is severed inwardly of its set screw 36, the blade 30 is prevented from roone coated surface, as indicated in Fig. 5. In this tating about the screw 35 as an axis. 40 view the body I0 is held at such an angle as In many cases the application of building pato position the angular surface l8 adjacent the per to a wall structure necessitates placement roofing material 28. The blade [4 is adjusted so of the paper and cutting thereof to fit the paper as to project sufficiently far beyond the guide to an area to be covered. I provide the blade 45 surface I8 to make a cut terminating slightly in 3?) with cutting edges 43 of concave configura- 5 the clear of the mineral surfacing 22. With the tion. These edges may be adjusted for cutting roofing material cut to the depth illustrated, the purposes by loosening the screw 36 and turning uncut surfacing may be broken in a straight line the blade 36 end for end to position the pin 34 corresponding to the line of cut. within the opening 44.

When one cutting corner of the blade becomes For packaging purposes, the blade 30 may be 50 dull, the blade may be reversed. Either end of disconnected from the body it), while the blade the blade may be associated with the angular 44 may be shifted inwardly of the body for bringsurface l8, and when all cutting corners of the ing the projecting cutting corner thereof within blade become dull, the dull end may be broken the contour of the body.

off to present a sharp cutting edge. To facili Without further elaboration, the foregoing will 55 so fully explain my invention that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. A roofing tool comprising a grooved handle, a cutting blade adjustably secured within said groove, said blade having a notched cutting edge, one end of said handle including guide means for limiting the cutting depth of the blade, said notches lying inwardly of said guide means, and means for securing the blade in position.

2. A roofing tool comprising a grooved handle, a blade including two cutting edges provided with aligned notches for weakening the blade transversely, one corner of said blade extending beyond the handle, said handle being provided with means for limiting the cutting depth of the projecting corner of the blade, said notches lying within said means, and means for securing the blade in position.

3. A device of the type described comprising a a handle provided with a groove, a blade including two cutting edges provided with aligned notches for weakening the blade, means for securing the blade in said groove, said handle be-f 4. A roofing cutter comprising a, handle having a longitudinal groove extending inwardly of one edge and intersecting one end, the said one end having a beveled surface intersecting said groove, a knife blade having a perforated edge, said knife blade lying within said groove with one corner of the blade projecting beyond said beveled edge, to expose a cutting reach of said sharpened edge, the remaining reach of thecutting edge lying wholly within said-groove, the op posite edge of said blade having abutting relation with the bottom of the groove, and means for securing the blade in the groove.

CHARLES c. KRAJICEK. 

